The article "Troubleshooting Browsing Error Messages in Microsoft Internet Explorer" describes the steps you can use to troubleshoot the following error messages:
a. The Page Cannot Be Displayed.
b. Internet Explorer cannot open the Internet site Web address. A connection with the server could not be established.
c. The page you are looking for is currently unavailable. The Web site might be experiencing technical difficulties, or you may need to adjust your browser settings.
d. Cannot find server or DNS Error.
e. An internal error occurred in Windows Internet extensions.
Note: If you don't find anything relevant, step-back to the main page titled, "Internet Explorer Support Center" and start on another item.
"The page cannot be displayed" shows up when trying to go to secure websites. Started doing this all-of-a-sudden! Had to go back to a restore point last time to fix. I've tried changing IE security settings, etc. I've tried disabling Norton Internet Security, although it worked fine before. (Now Norton doesn't show in the sys tray for some reason - I didn't change any settings and can't enble it nor uninstall it!!!) Anyone have an idea? (Running Windows XP Home, Latest Norton.)